cassini-bsp: Resolve kernel config warnings for Corstone-1000

Custom checks print warnings when kernel configuration options which
have been requested by docker and kubernetes are not set. This happens
when building for the Corstone-1000 because some of those options have
dependencies which are missing from the kernel configuration for that
platform.

Resolve the warnings by adding the missing dependencies.

Signed-off-by: Adam Johnston <adam.johnston@arm.com>